Coupling for tile pipes.



P. F. BROWN.

COUPLING FOR TILE PIPES..A

APPLICATION FILED IIAII. 23, 191e.

Patented July 3, 1917.

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COUPLINGFOR TILE PIPES.

Specification of LetterslE'atent.

Pateiiteddiily 3,- 19t?.

-Appli-catania 'iledelvlarch 23, 1916. Serial ,Nor 86,299.

To all uz/iam t may concern andthe object thereof is toprovide animproved coupling .or joint of` this iclass which is simple in construction, efficient in useand which is comparatively inexpensive j and `which will exclude both water and air, and i form a safe and reliable coupling or joint.

The invention is fully disclosed fin 1 the following specication, of which the faccompanying drawing forms apait,;in whichl the separate parts of my improvement are desig- .enated by suitable Areference characters in each .of the views, and in which Figure l is a side viewpartly in` section showing my coupling and the Amethod of `'making the same;

Fig. 2 an opposite side, view ofzthe device as shown inFig. l;

Fig. 3 a section on theline 3-3 of'Fig.2;

Fig. 4 a sectional detailfview of arr-mold i. `box or casing which I employ in making my improved coupling; and, u

`jFig.. 5 a partial section onvthe vline 5 5 of Fig. 8 and on Aan enlarged scale.

In the drawing forming part ofthisfspecif,

iication, I-,have shown at a two tilenpipe sections to be coupled,and in the practice of-my invention,the ends of saidpipe sections to be coupled or connected are provided with enlarged a-nnularheads a2,having similar flat annularfaces ,a3 and central annular projecting members at which are `beveled or rounded on their outersurfaces to form deep annulargrooves/f. Oneof the central projecting members a4 has an outwardly beveled extension a6 adapted to fit in an inwardly beveled annular recess a7 formed in the other projecting member a4. `This forms,1as will be seena tongue and groove connection or. equivalent construction for thel separate `pipe section, butmy invention is ,not limited to ,a tongue and .groove construction of `any specific form and also providedat theiirouter l a` mold box or casing rrform of constructionshown, of two oppofor the purpose I of heads a2 anysuitable construction ofv this classmay be employed.

The faces a? .of the :head members aware edges with ,deep I also provide b consisting, :in the annular rabbet grooves as.

site sides b2 and twofront, and fbackv members b3, these terms being employed'simply Vdescribing said .mold box or casing. Said mold box` or casing isV preferably composed ofsheet `metal but may be composed of any; suitable material andthe .bottom edges of the opposite side members b?, are provided with deep arc-shaped-.recesses t, and at the back of said .mold box or casing is secured a transverse keeper b5 ywithwhicli is connected a `flexiblestrap b, i .preferably composed of `fibrous material, but which 4 may be ,composed j, of any suitable material. `)In theJ practice of my invention the ends fof the pipe sections a to be coupled are abutted as shown in Fig. l, after which the mold box or casing b vis dropped down onto theheads a2, of the-.pipe sectioiisto be coupled., as showiiinfFigs. l yand 3, in which operation thetop parts 227 ofthe `opposite sidemembers b2` of themold box or casing fit' in the rabbet grooves as at the top of the ofthe pipe sections, and the `opposite sides of saidmold box or casing rest in said grooves.

lThe front of the moldibox or casing is provided, with projecting ears ba in which `is-mounted a transverse cam shaft c having a yoke-shaped handle c2 and after the mold box or casing hasibeen: placed in position, as shown in Figs. l and 2, the `strap 216 is passed downwardly beneath and around the abuttingparts of the heads a2 and through the rabbet grooves as, andthe free end portiony 2f ofsaid strap is; passed upwardly betweenthefront member haof the mold box or casing and the camshaft c, after which the camshaft c `is turnedby means of the handle c2 thereofso as to securely clamp and hold the end b9 of the strap Zit as shown in Fig. 8. l

After the mold box or casing of which vthe strap o6 forms a part has been placed iin position, as herein shown and described,

a 4,suitable liquid cement al is poured thereinto, the top thereof being opened, and said cement flows downintothe bottom of said `mold box or casing and gradually rises therein and around the abutting parts of the heads a2 of the pipe sections to be cop pled until the mold box or casing is entirely filled therewith, after which the cement is allowed to set or become hard, and thus securely locks or binds the pipe sections together as will be readily understood.

The cement which I prefer to use in the above described operation is preferably a bituminous compound, this form of cement being employed for the purpose of making an absolute air and water tight joint. When this form of cement is used I also coat or cover the abutting members of the heads a2 of the pipes to be coupled, and the faces a3 with liquid asphaltum or similar material to aid in producing the desired result, it being understood that the bituminous compound or cement will adhere more readily to the surfaces named when said surfaces have been coated with asphaltum, as stated.

By pouring the cement gradually into the mold box or casing in the above described operation, all air and moisture is forced out of said mold box or casing as the cement rises therein, and a perfectly air and water tight joint is produced.

In a companion application prepared and filed by me of equal date herewith, Serial No. 86,298, I have shown and described a pipe coupling` similar in all respects to that shown and described herein, except for the form and construction of the mold box or casing Z), and the method of its use and to which the invention described and claimed herein is limited. This invention is not limited to any particular form for the t butting members a6 of the heads a? of the pipe sections to be coupled, nor to any particular form of the face portions a3 of said heads, all that is necessary in this connection being to provide said heads with suitable projecting and abutting` members, and with the annular grooves as in which the parts of the mold box or casing fit, when said mold box or casing is in position for use.

The transverse keeper b5, in the form of construction shown, consists of a rod mounted in ears b1 secured to the sides of the mold box or casing and the strap b is passed around said rod and riveted as shown at bn, and

while I have specified that the strap bs may be composed of any suitable material I prefer that it be made of cotton fiber or asbestos in order that it will withstand the temperature at which the cement consisting of a bituminous compoundV is poured in the mold box or casing.

The cam-shaft c may be of any preferred construction but, in practice, I prefer to mill the surface thereof, as indicated in Fig. 5, so that it will grasp and hold the strap Z) and draw it tightly into position.

Another feature distinguishing the construction described and claimed herein from vbinder has set or become hard, and said mold box or casing may be used for forming any number of joints or couplings in the manner shown and described.

Having fully described my invention, what I claim as new andv desire to secure by Letters Patent, is Y l. The herein described means for coupling lor connecting the ends of tile pipes provided with enlarged annular heads formed on the ends of said4 pipes and provided with projecting andabuttmg members having annular grooves in theirouter surn faces, said heads being also provided in their adjacent faces andV at their perimeters with annular rabbet grooves, comprising a mold box or casing rectangular in form in cross section Vand open at the top and bottom and opposite sides of which are provided in their bottom edges with arc-shaped recesses, and a flexible strap memberconnected with one side of said mold box or casing at right angles to the sides in which said arc-shaped recesses are formed, said mold box or casing being adapted to be placed on said heads with the arc-shaped recessesV in opposite sides thereof fitting in the top portions of said rabbet grooves, and said strap being adapted to be passed beneath and around said heads and to fit inthe bottom and side portions of said rabbet grooves and detachably secured to the opposite side of said mold boxor casing.

2. The hereinrdescribed device for use in forming a coupling or connection for the ends of tile pipes, comprising a mold box or casing rectangular in form in cross section and open at the topV andbottom and opposite sides of which are provided in their bottom edges with arc-shaped recesses, and a flexible strap connected with one side of said mold box or casing at right angles to the sides having saidarc-shaped recesses and adapted to be detachably securedto the opposite side of said mold box or casing.

3. The herein described means for use in coupling or connecting the ends of tile pipes provided with enlarged annular heads having projecting and abutting members in the outer surfaces of which are annular grooves, said heads being also provided in their adjacent faces and at their perimeters with annular rabbet grooves, comprising a mold box or casing rectangular in formvin cross section and open at the top and bottom', the opposite sides of which are provided in their bottom edges with arc-shaped recesses, and a flexible strap connected with one side of the mold box or casing at right angles to the sides having the arcshaped recesses, said mold box or casing being adapted to be placed on said heads with the arc-shaped recesses fitting in the top portions of said i'abbet grooves, and said strap being adapted to be passed beneath and and to lit in the bottom of said rabbet grooves.

around said head and side portions Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

